10 Best Weatherproof Padlocks 2025 in the United States

The Master Lock Magnum Heavy Duty Outdoor Padlock with Key, model M115XDLF, is designed for robust outdoor use. It features a laminated steel body with a weather-resistant cover, enhancing its durability against harsh weather. The shackle is made from Tough-Cut octagonal boron-carbide, which is 50% harder than typical hardened steel, offering a high level of cut resistance—ideal for securing fences, gates, sheds, and more.

The 4-pin cylinder and dual ball bearing locking mechanism increase protection against picking and prying attempts, while a covered keyway and shackle add extra weather protection. The padlock's dimensions are compact with a 1-7/8 inch wide body and a 5/16 inch diameter shackle, providing flexibility for various applications. It includes one lock and two keys for convenience.

The primary material listed as plastic might be confusing, as the core body is steel with plastic covering for weather resistance. Weighing only 3.2 ounces, it is lightweight, which may or may not be a concern depending on the user's preference. It ranks #2 in Keyed Padlocks, highlighting its popularity and reliability as an outdoor locking solution. It’s important to measure your door's backset, cross bore, and thickness to ensure proper fitment.

The Master Lock Combination Lock, M175XDLF, is a heavy-duty weatherproof padlock designed for outdoor use, making it an excellent choice for securing gates, sheds, or storage areas. One of its standout features is the resettable four-digit combination, which allows for easy personalization and eliminates the need for keys, reducing the risk of losing them. The lock is constructed from durable zinc and features a tough octagonal boron-carbide shackle, which is significantly harder than traditional hardened steel. This toughness provides impressive resistance against picking and prying, enhancing security further.

For those concerned about weather conditions, this padlock comes with a shackle seal and a covered dial, offering superior protection against moisture and dust, thus extending its lifespan. The extended shackle is another plus, allowing for flexibility in various applications, especially when securing items with different thicknesses.

There are some considerations to keep in mind. While the combination lock is convenient, it may be perceived as less secure than traditional key locks, particularly if the combination is not chosen wisely. Additionally, the lock's size might not suit all applications, especially if a more compact model is required. The one-directional dial may also pose challenges in low-light scenarios, as it relies on remembering the specific turning direction.

The Sargent & Greenleaf 8077AD Combination Padlock boasts a hardened steel body and shackle, ensuring robust security and durability. It's designed to meet Federal Specification FF-P-110J, which might appeal to those looking for high-security standards. The padlock offers an impressive 125,000 possible combinations, adding to its security credentials. The jog dial controller and combination lock mechanism also provide ease of use without the need for keys.

The lock's polished finish and dimensions of 1.96 x 2.37 x 4.15 inches make it a good fit for various security applications. However, it's important to note that this padlock is intended for interior use only, which is a significant drawback for those needing weatherproofing for outdoor conditions. Additionally, while it shows obvious signs of tampering, it doesn't have any specific weatherproof coating to protect against the elements.

With a weight of 1.35 pounds, it is relatively heavy, which might be inconvenient for some users. If you need a strong, tamper-evident padlock for indoor use, the Sargent & Greenleaf 8077AD could be a suitable choice. However, for outdoor weatherproof requirements, this padlock might not be the best option.